<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
		<span>abbr标签用来表示一个缩写词或者首字母缩略词</span><br />
		<abbr title="Hello World">HW</abbr><br /><br />
	</body>
</html>
